| Release Date | 08 September 2003 |
| Budget | $22,000,000 |
| US Box Office | $52,000,000 |
| Tagline | An immortal battle for supremacy. |
| Genre | Action, Fantasy, Horror, Thriller, Sci-Fi |
| Country | USAGermanyHungaryUK |
| Filming Locations | Budapest, Hungary |
| Language | English |
| Sound Mix | DTS, Dolby Digital, SDDS |
| Color | Color |
| Film Type | Feature |
| Film Class | Gothic Film, Action Thriller, Romantic Fantasy |
| Mood | Fantastic Reality |
| Themes | Feuds, Vampires, Werewolves |
| Tones | Goth, Stylized, Nocturnal, Menacing, Eerie, Atmospheric, Creepy |
| Tags | Battle [war], Medical Student, Star Crossed Lovers, Supernatural Forces, Underground [below Earth], Vampire, Werewolf |
Underworld is a 2003 action-horror film about the secret history of Vampires and a type of werewolf known as Lycans (an abbreviated form of lycanthrope). It is the first film in the Underworld series. The main plot revolves around Selene (Kate Beckinsale), a vampire who is a Death Dealer hunting Lycans. She finds herself attracted to a human, Michael Corvin (Scott Speedman) who is being targeted by the Lycans. After Michael is bitten by a Lycan, Selene must decide whether to do her duty and kill him or go against her clan and save him.